Satisfaction (JS) and Organizational Commitment (OC) have been the subjects of a large amount of empirical research, but the nature of the causal relationship between JS and OC is still disputed. This paper provides a thorough assessment of the causal relationship between JS and OC by controlling the influence of personal traits and organizational attributes. Comparing the four models (JS <--> OC, JS -> OC, OC -> JS, and no causal effect between JS and OC), our result shows that the reciprocal relation model best fits the data.